135659621078 has 32 divisors (see below), whose sum is σ = 207325827072. Its totient is φ = 66563500000.

The previous prime is 135659621057. The next prime is 135659621093. The reversal of 135659621078 is 870126956531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15953828 + ... + 15962328.

It is an arithmetic number, because the mean of its divisors is an integer number (6478932096).

Almost surely, 2^135659621078 is an apocalyptic number.

135659621078 is a deficient number, since it is larger than the sum of its proper divisors (71666205994).

135659621078 is a wasteful number, since it uses less digits than its factorization.

135659621078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 135659621078 in words is "one hundred thirty-five billion, six hundred fifty-nine million, six hundred twenty-one thousand, seventy-eight".